155632013 has 4 divisors (see below), whose sum is σ = 156078300. Its totient is φ = 155185728.

The previous prime is 155632003. The next prime is 155632019. The reversal of 155632013 is 310236551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134490409 + 21141604 = 11597^2 + 4598^2 .

It is a cyclic number.

It is not a de Polignac number, because 155632013 - 2⁸ = 155631757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155632019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222620 + ... + 223317.

It is an arithmetic number, because the mean of its divisors is an integer number (39019575).

Almost surely, 2^155632013 is an apocalyptic number.

It is an amenable number.

155632013 is a deficient number, since it is larger than the sum of its proper divisors (446287).

155632013 is an equidigital number, since it uses as much as digits as its factorization.

155632013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446286.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 155632013 is about 12475.2560294368. The cubic root of 155632013 is about 537.8976475504.

Adding to 155632013 its reverse (310236551), we get a palindrome (465868564).

It can be divided in two parts, 15563 and 2013, that added together give a cube (17576 = 26³).

The spelling of 155632013 in words is "one hundred fifty-five million, six hundred thirty-two thousand, thirteen".